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Finding the Fourth Proportional to 18,027.78, 26,989.08 and 12,030.54

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Solution

The fourth proportional to 18,027.78, 26,989.08 and 12,030.54 is: 18,010.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,027.78 : 26,989.08 = 12,030.54 : x
  2. Step 2: Convert to fraction form
    18,027.78/26,989.08 = 12,030.54/x
  3. Step 3: Cross multiply
    18,027.78x = 26,989.08 × 12,030.54
  4. Step 4: Simplify right side
    18,027.78x = 324,693,206.50
  5. Step 5: Solve for x
    x = 324,693,206.50/18,027.78
  6. Step 6: Final answer
    x = 18,010.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.